Contents

Story

After helping Espio the Chameleon hack Dr. Eggman's Mad Matrix, or helping Rouge the Bat clear the Black Arms out of Death Ruins, Shadow comes out of a Chaos Control in Iron Jungle and spots Sonic standing on the wing of Tails' new spacecraft. Sonic informs Shadow that the Black Arms are on their way to the ARK, and the black hedgehog agrees to follow them. However, during the spaceflight, Shadow finds a capsule containing the ship's power source: the cyan Chaos Emerald. Making a comment that it's "like taking candy from a baby, which is fine by me", Shadow decides that gathering the Emeralds for himself is the most pressing priority, and breaks the capsule.

The Emerald's energies, combined with the ship's alarm's siren, trigger a memory from Shadow's past, which he slides into. Maria comes to Shadow (who was in the research lab at the time) and tells him that "something's gone terribly wrong with Grandfather's experiments". Maria recruits Shadow to stop the "monsters", which are the rampaging Artificial Chaos. Shadow can agree and hunt down the gelatinous blobs with the GUN forces, or head for the Professor himself in order to ensure his safety.

While never made entirely clear, it seems that this incident is entirely distinct (and preceding) from the eventual G.U.N. attack on Project Shadow depicted in The Doom. Lost Impact has the G.U.N. soldiers fighting with Gerald's staff to suppress the Artificial Chaos. If this is the case, Lost Impact may be the second life-threatening research malfunction on the ARK, the first being Emerl the Gizoid's rampage recounted in Prof. Gerald's Journal (Sonic Battle).

Keys locations

Use the elevator in the room with the first Checkpoint, and make your way to the top level. Once you are at the top, Climb the pole, and you will see the key in mid air.

Take the door on the right after the third Checkpoint, and go to the last room in that section. Don't destroy anything in that room, because you will need to use the tallest objects to reach the key that is suspended in mid air.

Rid the GUN Lift after the fifth Checkpoint, and when you get outside, Stop and jump to the right. The Rocket will take you up to the platform with the key.

Jump up above the green rail in the same room as the eighth Checkpoint. To get there, you need to head near the door, jump on the railing and move up to the ledge where the key is.

Take the door on the right side in the room with eighth Checkpoint, and break through the wall using the Grenade Launcher or a bomb. Behind the wall is the key.

'Many G.U.N. soldiers have been killed by the monsters. Could they have been created as a weapon?'

In the room with the sixth checkpoint, Maria makes a comment about the experiments looking cute when they break apart.

In the opening cutscene where Shadow appears in Iron Jungle, Sonic says 'We're on our way to the ARK, so I guess that means we're going too!'. This was the result of a mistranslation from the Japanese script to the English. The line should read 'They're (the Black Arms) on their way to the ARK, so I guess that means we're going too!'